All three statements are correct:
• Statement I: Correct - PM-PRANAM (Promotion of Alternate Nutrients for Agriculture Management) was launched to reduce the use of chemical fertilizers and promote sustainable agricultural practices.
• Statement II: Correct - PM-PRANAM is to be established under the GOBAR-Dhan (Galvanizing Organic Bio-Agro Resources - Dhan) scheme as part of the government's holistic waste-to-wealth approach.
• Statement III: Correct - As per the scheme design, 50% of the subsidy savings (due to reduced use of chemical fertilizers) will be given to the respective state as a grant to promote alternate fertilizers and related infrastructure.